Boost Pressure Calculator

Calculate boost requirements for target power levels.

HP
Baseline naturally aspirated power
HP
ft
°F

Boost Level Guidelines

Boost (PSI)Power IncreaseNotes
5-8~30-50%Mild, stock internals OK
10-15~60-100%Moderate, consider upgrades
18-22~120-150%High, forged internals
25-30~170-200%Race build required
35+200%+Full race build, E85/Meth

Unit Conversions

  • 1 bar = 14.5 PSI = 100 kPa
  • 1 atmosphere = 14.7 PSI = 101.3 kPa
  • PR 2.0 = 14.7 PSI boost (doubles air)
  • MAP = Barometric + Boost